.heart {
  position: absolute;
  display: block;
  width: 1em;
  height: 1em;
  transform: rotate(45deg);
}
.heart::before,
.heart::after {
  content: '';
  position: absolute;
  left: -50%;
  display: block;
  width: 100%;
  height: 100%;
  border-radius: 50%;
  background-color: inherit;
}
.heart::after {
  left: 0;
  top: -50%;
}
